Onewolf42

So I was sitting stopped at a red light yesterday afternoon waiting for the light to go green when the seat belt suddenly tightened up and the "Audi Pre Sense" warning message was displayed on the VC display. There was a car slowly approaching behind me. Does the Pre Sense detect/react to potential rear-end collisions? This may have been the 4th time Audi Pre Sense has gone bonkers and detected something that it should not have.

StKnowhere

Yes, think it will close windows and moonroof also.

Sensitivity can be set in the MMI. Or you can turn it off.

HyperS4

From the Audi Webpage:

"On some Audi models, pre sense front incorporates an additional function to protect against impending rear-end collisions in the lower speed range. At speeds under 30 km/h (18.64 mph) the function automatically decelerates the car if necessary with full force – regardless of whether the vehicle in front is moving or stationary. Under 20 km/h (12.43 mph) the new function can often prevent the accident entirely. In other cases it significantly reduces collision speed."

PghRich

That's pre-sense front, when you're about to rear-end someone in front of you. I believe the question was about being hit from behind, when stopped. On the Audi site:

HyperS4

Youre right, I was reading it wrong(brain still thinks its Monday). Thanks for posting the correct information.

radhaz

I've had it activate when driving on a residential street at 25mph when a fool sped past me on the left. Chime, belts tensioned, windows rolled up.

SCarGuy

A 2018 A4 has Presense Front as standard (Basic and City)
Presense Rear was standard on the Premium Plus

Onewolf42

I did not want to have to, but I disabled 'Presense' yesterday. I'm tired of the number of stupid "Crazy Ivans" the Audi Presense has instigated in the 9 months I have owned the car. Not once was it a valid scenario to Presense to be activated. And I had it at the lowest sensitivity setting.

idealdreams

I’ve owned my A4 with all available Audi Pre-Sense features for 10 months now and have never once had it go off on me mistakenly. Odd that you’ve had so many false triggers with yours. I have mine set to the soonest warning trigger too.

Soonermagic

I've had my A4 for a year with presense enabled and for early warning. I have received only 2 alerts which I would consider inaccurate. One was when a car was parked halfway on the shoulder and the road was curing to the right. The system "saw" the car as stationary in my lane. The other was one which I still am not sure what to think. I was turning left with more than adequate room to avoid oncoming traffic (like 40 yards). The car immediately braked hard to a stop. I was very thankful that I wasn't rear-ended. Of note is that I was facing directly into the sun in the late afternoon so that may have impacted the cameras.